Pediatrics Inborn Errors of Metabolism 75de221f Wilson's disease is caused by defect in: A ATP 7A mutation B ATP 7B mutation C Ceruloplasmin D ATP 7C mutation High-Yield Explanation b. ATP 7B mutation(Ref: Nelson's 20/e p 1939-1940, Ghai 8/e p 320-321)The abnormal gene for Wilson disease is ATP7B on long arm of chromosome 13 (13q14.3)